Facebook used react native for a while, which isn’t a web view wrapper, and then went away from that towards native: https://engineering.fb.com/2020/03/02/data-infrastructure/me...

So far the only actual success I’ve seen is electron on the desktop, and in that world everyone complains how apps use huge amounts of RAM.

There’s only one true success for a generic solution across all platforms: the web. Because it doesn’t pretend to integrate natively, nor depend on native APIs. But with it will always come limitations that cannot be avoided.